                         \begin{tabular}{l*{8}{c}} \hline \hline \noalign{\smallskip}                                       & \multicolumn{8}{c}{\shortstack{World ranking}} \\                                         \cmidrule(l){2-9}                                           & \multicolumn{1}{c}{\shortstack{1--20}}                                          & \multicolumn{1}{c}{\shortstack{21--50}}                                         & \multicolumn{1}{c}{\shortstack{51--100}}                                         & \multicolumn{1}{c}{\shortstack{101--250}}                                         & \multicolumn{1}{c}{\shortstack{251--500}}                                          & \multicolumn{1}{c}{\shortstack{501--1000}}                                          & \multicolumn{1}{c}{\shortstack{1001--2000}} & \multicolumn{1}{c}{\shortstack{Unranked}} \\                 
\hline \noalign{\smallskip}
Graduate quality		&    0.285\sym{***}  &    0.175\sym{***} 	&    0.157\sym{***}	&    0.105\sym{***}	&    0.100\sym{***}	&    0.137\sym{***}	&    0.107\sym{***} &    0.051\sym{***}\\
                		&  (0.017)              	&  (0.013)  		&  (0.011)        		&  (0.010)   		&  (0.009)    		&  (0.009)      		&  (0.008)    		&  (0.004)    \\
				&       [18]  		&       [22]   		&       [34]			&       [79]			&      [100]		&      [133]   		&      [184]     		&      [774]     \\
\hline \hline \noalign{\smallskip}                         \end{tabular}                 
